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Rev 131 Rev 134
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		old_pos     = pos;
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		old_pos     = pos;
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	}
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	}
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	void GLViewController::roll_ball(const CGLA::Vec2i& pos)
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	void GLViewController::roll_ball(const CGLA::Vec2i& pos)
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	{
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	{
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		Vec2f dir = Vec2f(pos-old_pos);
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		float len = dir.length();
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		if (len < TINY)
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			return;
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		//if ( pos == old_pos )
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		//	return;
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		ball->roll_ball(pos);
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		ball->roll_ball(pos);
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		if(last_action==ZOOM_ACTION)
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		if(last_action==ZOOM_ACTION)
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			set_near_and_far();
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			set_near_and_far();
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		Vec2f dir = Vec2f(pos-old_pos);
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		spin = dir.length()>=1.1f;
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		spin = len>=1.1f;
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		old_pos = pos;
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		old_pos = pos;
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	}
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	}
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	void GLViewController::release_ball()
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	void GLViewController::release_ball()